The couch does have a bladder. I can only assume it's the same stuff AIRE raft bladders are made of- we use SOTAR on the river. Whichever TA we have is for the urethane/pvc, and seems to hold fine in the couches, but only on the bladders. The outsides haven't needed any patching.
The little cuts in the bladder are somewhat alarming if that same thing happens to their boats. It's almost like a tiny crease in the bladder from not lining up PERFECTLY with the outer layer, and the material just splits right there at the crease. Not inspiring confidence in their boats for me, but I guess I'll get to find out this summer- new company with all AIREs, not SOTARs.